{"id":7303,"date":"2026-06-15T19:02:11","date_gmt":"2026-06-15T19:02:11","guid":{"rendered":"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/lake-tahoe-water-clarity-improved-in-2025-but-long-term-recovery-remains-stalled\/"},"modified":"2026-06-15T19:02:11","modified_gmt":"2026-06-15T19:02:11","slug":"lake-tahoe-water-clarity-improved-in-2025-but-long-term-recovery-remains-stalled","status":"publish","type":"post","link":"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/lake-tahoe-water-clarity-improved-in-2025-but-long-term-recovery-remains-stalled\/","title":{"rendered":"Lake Tahoe water clarity improved in 2025, but long-term recovery remains stalled"},"content":{"rendered":"<article><!-- --><!-- --><!-- WPS-5038 -- removed the script from WPS and added the placeholder for trinity player --><!-- --><!-- --><!-- --><!-- --><!-- --><!-- --><!-- --><!-- CONTENT --><!--[--><!--[--><\/p>\n<p>Lake Tahoe\u2019s water clarity has reached a plateau, showing no significant long-term improvement or decline, even as the annual average has trended downward over the past several decades.<\/p>\n<p>Read more <a href=\"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/newsom-says-doj-interviewed-associates-and-family-trying-to-find-a-crime-2\/\">Newsom says DOJ interviewed associates and family \u2018trying to find\u2019 a crime<\/a><\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>The annual average water clarity measured in 2025 was 69.2 feet \u2014 nearly 7 feet better than the average of 62.3 feet recorded in 2024, according to the . by UC Davis\u2019 Tahoe Environmental Research Center. Scientists gauge clarity by lowering a 10-inch white disk, called a Secchi disk, into the lake and measuring the depth at which it remains visible.<\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>Although the 2025 measurement improved compared with 2024, researchers cautioned against celebrating the change, explaining that water clarity remained far below historic levels.<\/p>\n<p><!--]--><!--[--><\/p>\n<p>\u201cWater clarity rapidly declined through the late 1990s and then leveled off to what we see today,\u201d Stephanie Hampton, the director of the Tahoe Environmental Research Center, said in a statement. \u201cStatistical analysis shows us that this year was not significantly different from last year, and lake clarity has not substantially improved for decades.\u201d<\/p>\n<p><!-- --><!--]--><!--[--><!--]--><!--[--><\/p>\n<h2>Declining clarity<\/h2>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>UC Davis began tracking the lake\u2019s clarity in 1968, when visibility measured 102.4 feet. Lake clarity has . Since 1988, water clarity has remained below 80 feet, with a high of 78.1 feet recorded in 2002 and a low of 60.4 feet measured in 2017.<\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>The states of California and Nevada jointly created the Tahoe Regional Planning Agency, or TRPA, in 1969 in response to early findings indicating the lake\u2019s declining clarity. Along with more than 80 public and private organizations, the TRPA is working to restore lake clarity to 97.4 feet \u2014 the average level recorded between 1967 and 1971 \u2014 under the Lake Tahoe Environmental Improvement Program, according to Kat Kerlin, a spokesperson for the UC Davis Tahoe Environmental Research Center.<\/p>\n<p>Read more <a href=\"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/fantasy-5-players-win-nearly-500000-in-california-see-where-tickets-sold-2\/\">Fantasy 5 players win nearly $500,000 in California. See where tickets sold<\/a><\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<h2>Causes of cloudy waters<\/h2>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>Researchers have identified fine particles in the lake\u2019s upper waters as one of the key factors affecting water clarity. Fine particles include microscopic sediment, debris and organic matter, including phytoplankton, wildfire ash, decaying plant debris and clay. They enter the lake from streams and the atmosphere or occur naturally in the lake. Seasonal peaks in fine particles in 2025 correlated with water clarity, aligning with findings from recent years.<\/p>\n<p><!--]--><!--[--><\/p>\n<p>However, for scientists seeking to restore the lake\u2019s clarity to its historic levels, the correlation does not explain why clarity has plateaued \u2014 the answer appears to lie in particle research, according to Hampton.<\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>\u201cOver the past several decades, water clarity has plateaued rather than improved,\u201d Hampton said. \u201cWhy isn\u2019t clarity improving more? To really answer that question and find out what is currently driving water clarity, examining the nature of the particles is a key research priority.\u201d<\/p>\n<p><!-- --><!--]--><!--[--><\/p>\n<p>Researchers will employ new techniques in 2026 to investigate the lake\u2019s phytoplankton community \u2014 including its smallest component, picoplankton \u2014 to determine the extent to which phytoplankton and picoplankton influence clarity. Using holographic imaging technology, scientists will also investigate particle aggregation to determine how the lake\u2019s physical dynamics cause particles to clump together and sink, affecting water clarity.<\/p>\n<p><!--]--><!--[--><\/p>\n<p>\u201cThese approaches aim to combine new science and engineering perspectives to understand the interconnected system of Lake Tahoe and help shape the future of clarity research at the lake,\u201d Kerlin said in a statement.<\/p>\n<p>Read more <a href=\"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/why-are-ca-homes-blurred-on-google-maps-heres-the-reason-some-areas-are-hidden-2\/\">Why are CA homes blurred on Google Maps? Here\u2019s the reason some areas are hidden<\/a><\/p>\n<p><!-- --><!--]--><!--]--><!-- --><!-- --><!-- --><!-- --><\/article>\n","protected":false},"excerpt":{"rendered":"<p>The 2025 Lake Tahoe Clarity Report showed a nearly 7-foot uptick in water clarity \u2014 but visibility remains below historic thresholds, researchers said.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-7303","post","type-post","status-publish","format-standard","hentry","category-local"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lake Tahoe water clarity improved in 2025, but long-term recovery remains stalled - San Diego Relocation News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sandiegorelocationnews.com\/index.php\/2026\/06\/15\/lake-tahoe-water-clarity-improved-in-2025-but-long-term-recovery-remains-stalled\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lake Tahoe water clarity improved in 2025, but long-term recovery remains stalled - 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